Add frontend.

frontend/src/app/app.component.ts

@@ -0,0 +1,19 @@
+import { CommonModule } from '@angular/common';
+import { Component } from '@angular/core';
+import { RouterOutlet } from '@angular/router';
+import { HeaderComponent } from './components/header/header.component';
+
+@Component({
+  selector: 'app-root',
+  standalone: true,
+  imports: [
+    CommonModule,
+    RouterOutlet,
+    HeaderComponent
+  ],
+  templateUrl: './app.component.html',
+  styleUrl: './app.component.scss'
+})
+export class AppComponent {
+  title = 'codiki-ng';
+}